[Bushwacker]

I originally mounted my 115 with cav plate flush with bottom because 34 years ago I didn't know any better! When I switched from an aluminum to a stainless 13.75 x 15" pitch OMC SST prop, I raised motor 1 hole and picked up about 3 mph in top speed, which is what they claimed/recommended for that prop. It had a fairly heavy trailing edge cup which allowed it to still get a good bite on the water at the higher position. It would ventilate in rough seas so I'd have to trim it down then, but that's to be expected with a raised motor. It proved to be a good change.